Narada Power Source Co., Ltd. EosG series operation manual V3.7
17
Table3-2 Solar system parameter establishment table
Parameter name
Recommendation parameter
（
reference
）
The largest depth of discharge of system
< 80
％
Protection voltage of over discharge
1.95V/cell
The depth of discharge per day
10
％－
30
％
The optimum charge current
（
A
）
0.1C
10
The largest charge current
（
A
）
0.25C
10
Equalization voltage
（
25
℃
）
2.40V/cell
，
Condition to equalization charge to
float charge is charge current below
6mA/Ah(or break away controller)
Float voltage
2.25V/cell
Temperature compensate radio with
float charge voltage
（
mV/ /cell
℃
）
-3
Temperature compensate radio with
equalization charge voltage
（
mV/ /cell
℃
）
-5
The factor of over capacity of system
The continues overcast and rainy days a year
The coefficient of capacity & life is 1.25
The coefficient of capacity in winter
temperature, reference to Fig 3-1
2. Capacity and Influence Factor
The capacity of battery is the capacity that battery can be discharged on the established
conditions, expressed as signal C. The usual unit of capacity is ampere-hour, shortened as AH.
The capacity can be expressed in Rated Capacity or Actual Capacity. The Rated Capacity of
EosG battery please see Table 1-1. The Actual Capacity is the product of the discharge current
and the discharge time, the unit is AH.
3. Ambient temperature Vs. Battery
Temperature affects capacity of the battery. Fig. 3-1 is the available capacity (10h rate) curve
vs. ambient temperature. From Fig. 3-1, if the temperature is too low, the capacity will
decrease. For example, the capacity will decrease 20% if temperature decreases form 25
℃
to
0
℃
; And too low temperature will cause battery long term insufficient charged, also will cause
no discharge and negative plates sulfate.
